Induction device



Feb. 11, 1947. Wv C' HALL, JR 2,415,688

INDUCTION DEVICE Filed May 5, 1945 2 Sheets-Shevefl l Feb. 11, 1947. W QHALL1 JR 2,415,688 Y INDUCTION DEVICE Filed May 5, 1943 2 Sheets-Sheet 2INVENTOR M/YLLAPD C. HHLL,I7T.

ATTORNEY Patented Feb. 11, 1947 INDUCTION Device Willard C. Hall, Jr.,Los Angeles, Calif., assignor to Mrs. Helen J. Hall, Jr., Los Angeles,Calif.

Application May 5, 1943, Serial No. 485,727

2 Claims.

This invention was conceived to eliminate the need for cords, wires andthe like from portable electrical devices and appliances suchY aslighting devices, hand irons, percolators, waiile irons, mixers, chafingdishes, juice extractors, radios, ctc. Cords, as now commonly used forelectrically connecting such portable devices to wall and iioorreceptacles and sockets, have long been. a nuisance, iire hazard,dangerous and an unsightly necessity in homes, restaurants, workshopsand other places where portable electrical devices have been needed. Itis a purpose of this invention to obviatel such cords and wireswhereverpossible.

The aims of this invention are accomplished by utilizing electricalinduction means, that is, to provide one or more substantially fixedprimary transformer elements or induction outlets which are concealed ornearly concealed in the walls, oors, ceilings, cabinets or otherfixtures of buildings or outdoor locations, and tov provide acomplementary receiver or transformer secondary unit or units designedto be placed in the eld of the primary transformer outlet so thatelectrical energy can readily be utilized without the aid of cords orwires between the outlet and the secondary units.

This invention is especially useful when combined with ironing boardsand the like since it is readily apparent that an ironer can do muchbetter and quicker work when there is no cord dangling from the iron,and also due to the lack of cord, troubles such as shorts caused by wearthereof and also attachment plug breakages. Therefore, work stoppagesand delays caused by these cord faults' are eliminated.

One of the principal objects of this invention is to present a cordlessand wireless means for transferring electrical power from iixed outletsto power receivers, such means being sturdy and simple in constructionand economical to make and use.

Another object is to provide all kinds of portable electrical deviceswith cordless and wireless electrical connection to a supply ofelectrical power without resorting to any physical connecting means orcomplicated non-physical connecting means.

Other objects, advantages and features of my invention will appear fromthe accompanying drawings, the subjoined detailed description, thepreamble of these speciiications and the appended claims.

Applicant is about to illustrate and describe one of the forms of hisinvention in order to teach one how to make and use the same, but it isto be understood that the drawings and description thereof are not tolimit the .invention in any sense whatsoever, except, as limited by theappended claims.

In the drawings:

Fig. 1 shows in elevation, an electric hand iron, parts being brokenaway to show some parts in detail.

Fig. 2 is a horizontal section taken substantially along the line 2-2 ofFig. l.

Fig, 3 is a vertical section taken substantial- 1y along the line 3--3of Fig. 1.

Fig. 4 is an elevational view showing various appliances that can beused with thisV invention.

Fig, 5 is an elevational view of a liquid mixer using the invention.

Fig. 6 is an elevation of an electrical motor device using theinvention.

The numeral I indicates a hand iron in general having the non-magneticmetal base shoe 2, metal base shell 3, handle grip 4 of insulatingmaterial, and its supporting frame 5. The shoe of the iron is recessedto accommodate a heating element E which is a triangular form of micaupon which is wound a resistor 'I in wire form having the ends 8 and v9.

The hand iron is shown as resting upon a non-magnetic metal plate I0which is countersunk into the top surface of an ironing board I I. Theplate lil has a recessed area 2 which provides a well marked receiverfor proper positioning of the iron.

Electrical energy is supplied to the iron by a half transformer sectionI 3, which is the primary portion thereof, and which isV positionedwithin the cavity I4 of the ironing board. Within the shell 3 oftheiron, is a half transformer section I5, which is the secondary portionthereof, and which is positioned at the heel part of the iron and fixedto the shoe thereof in any convenient manner, as by bolts. Thissecondary portion or element' and the primary portion or element form acomplete transformer unit, the two cornplementa-ry parts being adaptedfor electrical coupling and uncoupling with respect to each other.

The secondary portion is formed of an E laminated core stack having thecentral leg I6 and end legs il and I8; the leg i6 having a coil with theinsulated wire ends 20 and 22 thereof connected to one side 23 of aswitch 24 in the handle 4 of the iron. and to the heating element endwire 9 respectively. The other side 25 of the switch is connected to theother heating element Wire end 8 by the insulated wire 2l. The entire Ecore andcoil thereof are. encased in a mica insulating shell 26.

The switch 24 in the handle is in an elongated cavity 2 with end flanges28 and 29' as shown. In this cavity is a iinger bar Sii adapted to belifted by the fingers of the iron-er when the iron is to be removed fromthe stand or plate. ill. By breaking the secondary circuit, and theprimary circuit, as well as providing shaded poles for the primary,there is very V`little magnetism to retard free removal of the. ironfrom the plate 3 I0. 'I'he switch point 25 is xed to an insulated armthat is attached to the rear upward support of the frame 5, and theother switch point 23 has an arm that is fixed to the top of the switchlever or bar 30. Pockets 3l and 32 in the handle l house compressionsprings 33 which press against the top of the switch bar to continuouslyurge the bar downwardly and keep the switch points 23 and 25 in contactwhen the bar is not lifted. To limit the downward position of the bar,the bar has on each end a tongue 34 which engage the stops or flanges 23and 29 of the handle.`

The primary I3 of the transformer is also an E core or laminated stackhaving the central leg 35 with a pair of primary coils 33 and 31 whichare arranged in parallel, the coil Sii having about twice the number ofturns of coil 31. One end of each of the coils 33 and 31 are connectedto a lead 38 which connects with the house side of the toggle doublepole switch 49. The other end of the coil 36 connects with one end ofthe coil of the relay 39 and the other end of the relay coil leads tohouse side of the switch 49. The outer end of the outer winding 31connects with the relay stationary contact point 35. The other end ofthe outer coil is connected to the wire 33. The other contact point 4Iof the relay is supported by the spring arm @2, this arm 92 being sprungto automatically open contacts 39 and il when the relay coil is notfully energized. The arm is xed to a side wall oi the cavity It and ismade of spring steel. The point il connects with a curled exible wire i3that connects with wire it through the thermostat 135. This thermostatoperates to out out coil 31 when the temperature of the chamber I4becomes too hot or rises above a predetermined temperature, which is atemperature regulation means for the hand iron. This thermostat may beplaced in contact with the plate I3 if desired. The double pole switchis connected to a source of suitable electric current by the insulatedwires 43 and 43.

The, outer legs 59 and 50 of the E core have a closed winding of fewturns I and 52 respectively which shade these poles and aid in theremoval of the iron from the plate l0. These shading poles substantiallyremove alternating current chatter and noise between the iron I andplate I0. The high reluctance bridge pieces 53 and 59 with insulatinggap pieces 55 are provided between the tops of the outer transformerlegs and the central leg to maintain a shortened path of weak flux whenthe primary relay switch is open so that the main flux will quicklybuild up when the iron is placed on the stand l0. y

When the hand iron is lifted by the handle Il, the bar opens thesecondary circuit which in turn reduces the current in the primarycircuits. This drop in current in the low-current coil occurs also insolenoid 38 (which is in series therewith) and causes opening of switch38-39, thus breaking the circuit of the high-current primary coil 31.zero, making it much easier to remove the hand iron from the stand orplate I9. This hand iron form of the invention is designed for the usualhouse lighting cycle circuit of 115 volts; the coil 31 being designed tocarry 6 amps., the coil 36 about 1/2 amp., and the coil I9 to provideabout 600 watts to the-heating element 1. l

In Fig. 4 of the drawings, isv shown a table top 51 having installedtherein spaced apart primary units I3. Over one of the primary units isa p ercolator 58, over another unit atoaster 59,- and over still anotherunit a grill $0. Each one of- 'Ihe flux due to coil 31 thus drops tov 4the portable appliances, percolator, toaster and grill, has a secondaryunit I5 which supplies the current to the heating element and/orelements of the appliance.

Fig. 5 shows a liquid mixer 5I for drinks and the like resting upon thetable top 62 and which haVe the matched transformer units I3 and l5 forsupplying current to operate the motor 63 of the mixer.

Fig. 6 shows a bench top 64 with a power motor 65 mounted thereon, themotor having a grinding stone 66 and a saw blade or wheel 61 on theshaft thereof and a transformer unit I5 and the bench a transformer unitI3. Obviously, the invention can readily be applied to all kinds ofportable electric appliances including table. and floor lamps, vacuumcleaners, room heaters, etc.

Having thus described my invention, what is claimed as new and desiredto be secured by Letters Patent is:

l. An electrical ironing device comprising an appliance with a handlehaving a switch therein and a stationary current supply station adaptedto be placed near where the appliance is to be used, the appliance andthe station having complementary transformer parts adapted to besubstantially alined for interchange of energy, each transformer partincluding a core stack with a coil thereon, a heating element in theappliance,

the coil of the appliance having connection with the element forsupplying it with electrical energy, the coil of the station havingconnection with a source of current supply, current breaker means in thestation to materially reduce the flux in its core stack, the currentbreaker means being operated by current drop in the coil of the stationwhen the switch of the handle is opened by lifting the handle.

2. An electrical ironing board device comprising an ironing applianceand a supply station for energizing the appliance, depressed means forpositioning the appliance over the supply station, the appliance and thestation having complementary parte of a transformer which are properlyalined by said depressed means, the complementary parts of thetransformer each including a core with a coil thereon, the coil of onecore being connected to the current utilization portion of the applianceand the coil of the other core having' connection with a source ofcurrent supply, `cur.

other of the parallel coils when the ilux through the relay coil is at apredetermined density.l

.s vvvlninnp o. HALL, Je.

REFERENCES CITED The following references are of record 'in' the file ofthis patent:

v UNITED STATES PATENTS Number

